The Evolution 1016 Integrated Chain from Kryptonite is a heavy duty solution to keeping your bike secure. Constructed from 10mm six-sided chain links made from 3T Manganese steel for massive amounts of strength and durability, with a unique End Link Design that secures chain to hardened deadbolt to eliminate critical vulnerability. It features a patented, reinforced oval crossbar lock head, sliding dustcover to protect the cylinder life, 3 stainless steel keys (one LED lit key with replaceable battery and 2 new ergonomic keys) and a durable weather-resistant nylon sleeve to prevent scratches. The Kryptonite Evolution 1016 Integrated Chain weighs in at 4.4kg (9.7lbs).